Siren rotor



Au -{12, 1930. L. H}. MILES 1,772,614

' SIREN ROTOR Filed Aug. 20, 1929 IN VEN TOR.

L. H. M/LES q i I AT ORNEY.

Patented Aug. 12, 1930- UNITED STATES PATENT OFFICE mm a. mas, or nos moms, 'oamronm simm aoroa Original application filed latch 29,

This inventionrelates to a siren.

The general object of this invention isto providean improved siren.'

Another object of this invention is to pro- 6 vide a siren having peripheral flange sections and having curved vanes connected: 7 to the flange sections.

A still further object of the invention is to provide a siren having a hub and having 10 a novel type of vane associated therewith. I

A further object of the invention isto provide a siren havin curved vanes.

Other objects the invention will be apparent from the following description taken 1n connection with the accompanying drawin? wherein:

g. 1 is a central longitudinal section of my improved siren showing the operating parts t ereof.

Fig. 2 is a front view of the siren with the cover removed. I 1

Fig. 3 is a view similar to Fig. 2 showing a slight modification.

Fig. 4 is a section through the modified siren taken on line 4-4 of Fig. 3.

Fig. 5 is a view similar to Fig. 2 showing a further modification, and

Fig. 6 is a section on line 6-6 of Fig. 5.

This application is a division of and addi nding application Serial tion to my co- No. 179,210, filed March 29, 1927.

, Referring to .the drawings by reference characters I have indicated my invention as embodied in a siren indicate generally at 10. As shown in the drawings the siren 10 comprises a casing indicated generally at 11. .This casing includes a hollow cylindrical body'portion 12 and a cover plate 13 having a reduced hollow cylindrical hub or port member 14 thereon. The body 12 is also provided on its outer'periphery with a plurality of. spaced apertures or ports 15 as clearly shown in Figs. 1 and 2, and a hollow boss 16, the function of which will be later described.

Mounted within the body 12 is a rotor 17 This rotor comprises a flat circular plate 18 provided at its center with a curved hub 19 and on its outer periphery with a plurality of short, arcuate spaced flanges 20. From one end of each flange 20 a vane 21 extends a short straight portion 22 and a longer curved portion 23 with the end of the portlon 23 spaced from the-base of the curved hub 19. The vanes 22 are referably of uniform height throughout and wardly so, that the portion 21 is ahead when the rotor is rotated. The construction is such that when the rotor 17 is revolved the vanes 21 force the air outwardly from the center through the apertures at the end of the flanges 20 and 1927, Serial Io. 179,210. Divided and this application filed; August V I '20, 1929. Serial No. 887,247.

55 they are curved out:

through the ports 15 of the casing. As the air is forced outwardly and the'ports 15 are intermittently opened and closed by the rotor flanges 20 a loud noise is produced. The at sence of connection between the vanes and the I hub 19 and the shape and arrangement of the vanes, all combine to lessen the resistance as the rotor revolves while increasing the vol ume of sound produced.

the hub 19 also allows more air to enter the chamber between the vanes and thus a renter quantity of air may be forced out t 'rough' the ports 15, thereby producing a much louder noise than if a1 and were connected with the hub 19.

the vanes ran direct to The spacing of the ends of the vanes from the casing with an enlarged flange 27. The

shaft 25 and the rotormay be secured together as by a nut 28.

The rotor 17 is shown in the drawings as. adapted to be drivenby a disk 29--which may be adjustably mounted on the shaft 25 shown. The rotor may, however, be driven in an other desired manner.

In 1g. 3 I show a siren whereln the casing 12' is similar to the casing 12. In this modification the rotor 30 has peripheral flange seg-' ments 31 thereon and a hub 32. A vane 33'is F231;, attached to each segment31 between the body e tion 34 and a curved portion 35 which terjgthereof. Each vane comprises a strai t minates short of the hub 32.

In Fig. 5 I show a further modification V I wherein the rotor is provided at its center with a. hub 41 and on its outer periphery with a plurality of spaced flange segments 42. From one end of each alternate flange 42 a vane 43 extends and joins the hub 41 and from one end of each of the remaining flanges 42 I provide a vane 44 which terminates intermediate the flange and the hub 41. The vanes 43 preferably have a cut away portion 45 (see Fig. 6) adjacent their juncture with the hub 41. The vanes 43 and 44 are curved outwardly opposite to the direction of rotation as clearly shown in Fig. 5.

Having thus described my invention, what I claim is:

1. In a siren, a casing, a cover for said casing having a central aperture therein, a rotor mounted in said casing, said casing having peripheral apertures therein, said rotor ineluding a flat base plate having a rounded hub thereon, said base plate having spaced, annular, peripheral, flange sections thereon forming apertures therebetween, a vane extending from the end of each of said flange sections, each of said vanes comprising a short straight portion and a longer curved portion, said vanes terminating short of said hub.

2. In a siren, a casing, a rotor in said casing, vanes on said rotor, a hub on said rotor, certain of said vanes engaging said hub and having a cut-away portion and other of said vanes terminating short of said hub.

3. In a siren, a casing, a rotor in said casing, means for rotatably supporting said rotor, vanes on said rotor, a hub on said rotor, certain of said vanes engaging said hub, and other of said vanes terminating short of said hub.

4. In asiren, a casing, a rotor in said casing,

rotor is rotated, said vanes merging into said base plate short of said hub.

In testimony whereof, I hereunto aflix my signature.

LESTER H. MILES.

a plurality ofvanes on said rotor, certain of said vanes each extending from a point near the periphery of the rotor to a point near the axis of said rotor, the remaining vanes being shorter and terminating farther from the axis of said rotor.

5. In a siren, a casing, a rotor in said casing,

a hub on said rotor, a plurality of peripheral flange se ments on said rotor, a vane on certain of said segments, each of said vanes being connected to said hub, said v'anes having a portion cut away adjacent to the hub.

6. In a siren, a-casing having a cover a rotor in said casin g, a hub on said rotor, a p u-- rality of peripheral flange segments on said rotor, a plurality of vanes adjacent to said segments, each alternate vane terminating short of said hub, the remainin vanes being extended and connected to said ub:

7. In a. siren, a casing, a rotor mounted in said casing, a hub on said rotor, a lurality I of peripheral flange portions on sai rotor, 11. plurahty of vanes associated with said flanges, each alternate vane terminating short of said hub, the remaining vanes being extended and connected to said hub, said last mentioned vanes having a portion cut away adjacent to the hub. 

